Finding the Fourth Proportional to 2,486.34, 3,729.89 and 842.45

Step by Step Solution

1. Step 1: Write the proportion equation
   2,486.34 : 3,729.89 = 842.45 : x
2. Step 2: Convert to fraction form
   2,486.34/3,729.89 = 842.45/x
3. Step 3: Cross multiply
   2,486.34x = 3,729.89 × 842.45
4. Step 4: Simplify right side
   2,486.34x = 3,142,229.29
5. Step 5: Solve for x
   x = 3,142,229.29/2,486.34
6. Step 6: Final answer
   x = 1,263.80